CN112940574A - Fluorescent anticorrosive paint and preparation method thereof - Google Patents
Fluorescent anticorrosive paint and preparation method thereof Download PDFInfo
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- CN112940574A CN112940574A CN202110176183.2A CN202110176183A CN112940574A CN 112940574 A CN112940574 A CN 112940574A CN 202110176183 A CN202110176183 A CN 202110176183A CN 112940574 A CN112940574 A CN 112940574A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D133/00—Coating compositions based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Coating compositions based on derivatives of such polymers
- C09D133/04—Homopolymers or copolymers of esters
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/08—Anti-corrosive paints
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D5/00—Coating compositions, e.g. paints, varnishes or lacquers, characterised by their physical nature or the effects produced; Filling pastes
- C09D5/22—Luminous paints
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Abstract
A fluorescent anticorrosive paint and a preparation method thereof belong to the technical field of anticorrosive materials, and particularly relate to a fluorescent anticorrosive paint and a preparation method thereof. The invention aims to solve the problem that the corrosion degree of the paint with cracks cannot be timely and accurately judged in the prior art. A fluorescent anticorrosive paint comprises acrylic resin emulsion, graphene oxide/polyisocyanate filler, a rare earth fluorescent material, a curing agent and a film-forming auxiliary agent. The preparation method comprises the following steps: firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method; secondly, mixing by adopting a material filling method to obtain the fluorescent anticorrosive paint; the advantages are that: firstly, the method is green, environment-friendly, safe, low in toxicity, simple and convenient to operate and low in cost; stable and excellent corrosion resistance and long service life. And secondly, the occurrence state of corrosion can be transmitted in a light form, so that the corrosion process of the metal can be identified greatly conveniently and accurately. The fluorescent anticorrosive paint prepared by the invention is mainly used for metal material corrosion prevention.
Description
Technical Field
The invention belongs to the technical field of anticorrosive materials, and particularly relates to a fluorescent anticorrosive paint and a preparation method thereof.
Background
Because the equipment and the pipeline of a factory are often in a humid environment, the equipment and the pipeline are easy to corrode and damage, especially in a low-temperature environment in winter, the coating coated on the surface of the equipment and the pipeline is easy to crack and crack, and a corrosive medium enters the cracks to corrode a metal material substrate. If cracks and gaps of the coating are not found timely, the mechanical property and the service life of the metal material can be greatly reduced by the entering corrosive medium, so that the anticorrosion treatment of the equipment and the pipeline is very important, and the coating of the surface is one of important anticorrosion methods.
Single component coatings are often used to address the corrosion problem of metals. The common anticorrosive paint mainly comprises grease paint, phenolic resin, raw lacquer, epoxy resin paint and the like, wherein the grease paint has good brushing property, strong wettability to the metal surface, low price and flexible paint film, but the paint film is slow to dry, has poor mechanical property, and has poor acid and alkali resistance, water resistance and organic solvent resistance; the alcohol-soluble phenolic resin coating has good corrosion resistance, but is inconvenient to construct, poor in flexibility and adhesion and limited in application; the raw lacquer has strong adhesive force, tough and tough lacquer film and good luster, resists soil corrosion, water and oil, but has high toxicity and is easy to cause allergy to human skin; the epoxy resin coating has high adhesion to metal materials, small shrinkage of a coating film, high hardness and excellent electrical insulating property, but when an organic solvent is used as a diluent, air pollution is easily caused; the water-based epoxy resin coating is an environment-friendly anticorrosive coating which is widely applied, does not cause air pollution, but has the defects of high surface tension, flash rust, poor stability and the like, and is difficult to achieve good anticorrosive effect under humid and cold conditions. The graphene oxide is used as a derivative of graphene, has a staggered layered structure similar to graphene, has a large specific surface area, can be doped into a water-based anticorrosive coating system as a filler, improves the stability and the protection degree of the water-based anticorrosive coating, but still has the problems of easy agglomeration and uneven dispersion, cannot completely avoid the permeation of corrosive media, and the anticorrosive effect needs to be further improved; more importantly, the corrosion degree of the coating with cracks cannot be timely and accurately judged at present, and the corrosion part cannot be timely repaired, so that the damage to the pipeline and equipment is effectively avoided.
Disclosure of Invention
The invention aims to solve the problem that the prior art cannot timely and accurately judge the corrosion degree of a paint with cracks, and provides a fluorescent anticorrosive paint and a preparation method thereof.
A fluorescent anticorrosive paint comprises acrylic resin emulsion, graphene oxide/polyisocyanate filler, a rare earth fluorescent material, a curing agent and a film-forming auxiliary agent; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 0.1-10 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.1-0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 1-5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.1-1: 1.
A preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic to obtain a graphene oxide aqueous solution with the mass fraction of 0.01-1%; heating to 90 ℃, adding polyisocyanate into 0.01-1% graphene oxide aqueous solution by mass, and carrying out grafting compounding under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 10-30%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 5-60 min, adding a curing agent, and stirring and mixing for 5-60 min to obtain a fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 0.1-10 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.1-0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 1-5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.1-1: 1.
The invention has the advantages that: firstly, preparing a graphene oxide/polyisocyanate/acrylic resin environment-friendly anticorrosive coating by adopting a material filling method on the basis of preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method; and then uniformly doping the rare earth fluorescent material into the coating, thereby obtaining the graphene oxide/polyisocyanate/acrylic resin fluorescent anticorrosive coating. The method is environment-friendly, safe, low in toxicity, simple and convenient to operate and low in cost; the prepared graphene oxide/polyisocyanate filler is regular in size and smooth and complete in appearance; the prepared graphene oxide/polyisocyanate/acrylic resin fluorescent anticorrosive paint has stable and excellent anticorrosive performance and long service life. And secondly, the polyisocyanate has light retention, corrosion resistance and water resistance, the graphene oxide contains a large number of active oxygen-containing groups, and the polyisocyanate and the graphene oxide are subjected to covalent bond grafting compounding by a solution blending method to form the lamellar structure filler with good dispersibility and large specific surface area. Compared with the traditional polymer coating anticorrosive paint, the prepared fluorescent anticorrosive paint can not only provide the performance of protecting the base material, but also transmit the occurrence state of corrosion in a light form, and greatly conveniently and accurately identify the corrosion process of metal. And thirdly, the acrylic resin has the advantages of the water-based epoxy resin, the functional group of the acrylic resin can react with the functional group of the novel filler to form a net structure, the stability, the weather resistance and the protection degree of the coating are improved, and the prepared coating is suitable for corrosion prevention of metal materials. The fluorescent anticorrosive paint is a green environment-friendly anticorrosive paint, and the fluorescent paint doped with the filler has good physical barrier property and strong pressure resistance. In addition, no volatile organic compound is generated in the preparation process of the coating, so that the harm to constructors and the natural environment is greatly reduced.
The fluorescent anticorrosive paint prepared by the invention is coated on the surface of a metal material through an automatic film coating machine and is used for corrosion prevention of the metal material.
Drawings
FIG. 1 is a scanning electron microscope of graphene oxide/polyisocyanate filler obtained in step one of example 11;
FIG. 2 is a scanning electron micrograph of a fluorescent anticorrosive paint obtained in example 11;
FIG. 3 is a daytime visual appearance of the fluorescent anticorrosive paint obtained in example 11;
FIG. 4 is a night visual image of the fluorescent anticorrosive paint obtained in example 11;
FIG. 5 is an overall process flow diagram including the preparation of graphite oxide, the preparation of fluorescent anti-corrosive paint, and the anti-corrosive process;
fig. 6 is a chemical synthesis route for the preparation of graphene oxide/polyisocyanate filler in step one of example 11.
Detailed Description
The first embodiment is as follows: the embodiment is a fluorescent anticorrosive paint, which comprises acrylic resin emulsion, graphene oxide/polyisocyanate filler, a rare earth fluorescent material, a curing agent and a film-forming auxiliary agent; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 0.1-10 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.1-0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 1-5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.1-1: 1.
The second embodiment is as follows: the present embodiment differs from the first embodiment in that: the graphene oxide/polyisocyanate filler is prepared by adopting a solution blending method, and the specific process is as follows:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic to obtain a graphene oxide aqueous solution with the mass fraction of 0.01-1%; heating to 90 ℃, adding polyisocyanate into 0.01-1% graphene oxide aqueous solution by mass, and carrying out grafting compounding under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 10-30%.
The rest is the same as the first embodiment.
The third concrete implementation mode: the present embodiment differs from the first or second embodiment in that: in the step (II), the average molecular weight of the polyisocyanate is K12-K90. The rest is the same as the first embodiment.
The fourth concrete implementation mode: the difference between this embodiment and one of the first to third embodiments is as follows: the film forming auxiliary agent comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature resistant auxiliary agent; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1. The others are the same as the first to third embodiments.
The fifth concrete implementation mode: the embodiment is a preparation method of a fluorescent anticorrosive paint, which is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic to obtain a graphene oxide aqueous solution with the mass fraction of 0.01-1%; heating to 90 ℃, adding polyisocyanate into 0.01-1% graphene oxide aqueous solution by mass, and carrying out grafting compounding under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 10-30%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 5-60 min, adding a curing agent, and stirring and mixing for 5-60 min to obtain a fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 0.1-10 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.1-0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 1-5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.1-1: 1.
The sixth specific implementation mode: the present embodiment is different from the fifth embodiment in that: the average molecular weight of the polyisocyanate in the first step is K12-K90. The rest is the same as the fifth embodiment.
The seventh embodiment: the present embodiment is different from the fifth or sixth embodiment in that: uniformly dispersing graphite oxide in deionized water by ultrasonic for 30-120 min to obtain a graphene oxide aqueous solution with the mass fraction of 0.01-1%. The other is the same as the fifth or sixth embodiment.
The specific implementation mode is eight: the fifth to seventh embodiments are different from the first to seventh embodiments in that: in the first step, grafting compounding is carried out for 30-120 min under the action of mechanical stirring and ultrasonic oscillation. The rest is the same as the fifth to seventh embodiments.
The specific implementation method nine: the fifth to eighth differences from the present embodiment are: the film-forming auxiliary agent comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature resistant auxiliary agent; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1. The rest is the same as the fifth to eighth embodiments.
The invention is not limited to the above embodiments, and one or a combination of several embodiments may also achieve the object of the invention.
The following tests are adopted to verify the effect of the invention:
example 1: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 30min to obtain a graphene oxide aqueous solution with the mass fraction of 0.01%; heating to 90 ℃, adding polyisocyanate into 0.01 mass percent of graphene oxide aqueous solution, and carrying out grafting compounding for 30min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 10%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 5min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 0.1 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.1; the addition amount of the curing agent in the fluorescent anticorrosive paint is 1.5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.1: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K12.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes.
Example 2: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 40min to obtain a graphene oxide aqueous solution with the mass fraction of 0.05%; heating to 90 ℃, adding polyisocyanate into 0.05 mass percent of graphene oxide aqueous solution, and carrying out grafting compounding for 40min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 15%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 10min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 0.5 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.2; the addition amount of the curing agent in the fluorescent anticorrosive paint is 1.5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.3: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K20.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes.
Example 3: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 50min to obtain a graphene oxide aqueous solution with the mass fraction of 0.1%; heating to 90 ℃, adding polyisocyanate into 0.1 mass percent of graphene oxide aqueous solution, and carrying out grafting compounding for 50min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 20%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 15min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 1 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.3; the addition amount of the curing agent in the fluorescent anticorrosive paint is 2 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.5: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K30.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes.
Example 4: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 60min to obtain a graphene oxide aqueous solution with the mass fraction of 0.2%; heating to 90 ℃, adding polyisocyanate into 0.2 mass percent of graphene oxide aqueous solution, and carrying out grafting compounding for 60min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 25%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 20min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 2 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.4; the addition amount of the curing agent in the fluorescent anticorrosive paint is 2.5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.7: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K40.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes.
Example 5: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 70min to obtain a graphene oxide aqueous solution with the mass fraction of 0.5%; heating to 90 ℃, adding polyisocyanate into 0.5 mass percent of graphene oxide aqueous solution, and carrying out grafting compounding for 70min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 30%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 25min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 3 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 3 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.9: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K40.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes.
Example 6: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 80min to obtain a graphene oxide aqueous solution with the mass fraction of 0.5%; heating to 90 ℃, adding polyisocyanate into 0.5 mass percent of graphene oxide aqueous solution, and carrying out grafting compounding for 80min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 30%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 30min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 4 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 3.5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 1: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K45.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes.
Example 7: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 90min to obtain a graphene oxide aqueous solution with the mass fraction of 0.5%; heating to 90 ℃, adding polyisocyanate into 0.5 mass percent of graphene oxide aqueous solution, and carrying out grafting compounding for 90min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 30%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 40min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 4 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 4 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 1: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K45.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes.
Example 8: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 100min to obtain a graphene oxide aqueous solution with the mass fraction of 0.7%; heating to 90 ℃, adding polyisocyanate into 0.7 mass percent of graphene oxide aqueous solution, and carrying out grafting compounding for 100min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 30%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 45min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 6 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 4.5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 1: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K60.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes.
Example 9: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 110min to obtain a graphene oxide aqueous solution with the mass fraction of 0.9%; heating to 90 ℃, adding polyisocyanate into 0.9 mass percent of graphene oxide aqueous solution, and carrying out grafting compounding for 110min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 30%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 50min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 7 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 1: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K80.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes.
Example 10: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 120min to obtain a graphene oxide aqueous solution with the mass fraction of 1%; heating to 90 ℃, adding polyisocyanate into a graphene oxide aqueous solution with the mass fraction of 1%, and carrying out grafting compounding for 120min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 30%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 60min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 10 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 1: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K90.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes.
Example 11: a preparation method of a fluorescent anticorrosive paint is specifically completed according to the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic for 100min to obtain a graphene oxide aqueous solution with the mass fraction of 0.5%; heating to 90 ℃, adding polyisocyanate into 0.5 mass percent of graphene oxide aqueous solution, and carrying out grafting compounding for 120min under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 20%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 50min, adding a curing agent, and stirring and mixing for 15min to obtain the fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 7 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 4 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.5: 1.
The polyisocyanate used in step one (c) of this example had an average molecular weight of K45.
In the second step, the film-forming assistant comprises an emulsifier, a defoaming agent, a dispersing agent, a wetting agent and a low-temperature-resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
The size of the graphite oxide selected in the first step of the embodiment is more than or equal to 352 meshes; the graphene oxide is prepared by the following steps: 5g of graphite and 2.5g of NaNO3And 108mLH2SO4And 12mLH3PO4Mix and stir in an ice bath for 10min, then slowly add 15g KMnO4Maintaining the temperature of the mixture below 5 ℃; the suspension reacts for 2 hours in an ice bath and is stirred for 60 min; then stirring again in the water bath at 40 ℃ for 60 min; adjusting the mixing temperature to 98 deg.C for 60min while continuously adding deionized water to make the suspension volume 400mL, and adding 15mLH after 5min2O2(ii) a Repeatedly centrifuging and washing the obtained sol by using deionized water and a 5% hydrochloric acid solution; and obtaining the graphene oxide.
And (3) detecting the anticorrosion effect: the fluorescent anticorrosive paint prepared in example 11 was coated on the surface of a Q235 steel plate by an automatic film coating machine with 3.5% NaCl solution as a corrosion medium and the Q235 steel plate as a protection target, naturally cured at room temperature, immersed in 3.5% NaCl solution, and then the steel plate was placed in an environment of-10 ℃ to analyze the corrosion and low temperature resistance of the Q235 steel plate.
And (3) carrying out electrochemical workstation test, wherein the test result shows that: after the coating is soaked for 10 days, the protection efficiency of the coating is 93.35%, and in a low-temperature environment, the protection efficiency of the coating is 94.41% which is higher than that of a single water-based coating by 69.98%.
And (3) accurately judging the corrosion position: through an accelerated corrosion test, the fluorescent anticorrosive paint follows the light-emitting principle, has the fluorescent characteristic, and changes the fluorescent intensity of the coating under the stimulation of a certain condition. In 3.5% NaCl solution, Na + and Cl-which are continuously and deeply inserted can affect the structure on a molecular chain to reduce the fluorescence intensity, and the luminous intensity of the coating shows a continuously weakened trend, so that the corrosion process is judged according to the fluorescence intensity, and the corrosion position is accurately measured.
FIG. 1 is a scanning electron microscope of graphene oxide/polyisocyanate filler obtained in step one of example 11; fig. 1 illustrates that the graphene oxide/polyisocyanate filler has a lamellar structure, is slightly wrinkled, has a uniform surface, forms a dense lamellar layer, and has excellent physical barrier property, strong interface adhesion and stable mechanical resistance.
FIG. 2 is a scanning electron microscope image of the fluorescent anticorrosive coating obtained in example 11, and FIG. 2 illustrates that the surface of the coating doped with nanophosphors and graphene oxide/polyisocyanate fillers is rough, the presence of these nanoplatelets prevents cracking and the ingress of corrosive media on the coating surface, and the graphene oxide/polyisocyanate fillers improve the water resistance, heat resistance and corrosion resistance of the coating and prolong the service life.
Fig. 3 is a daytime visual image of the fluorescent anticorrosive coating obtained in example 11, fig. 4 is a nighttime visual image of the fluorescent anticorrosive coating obtained in example 11, and it can be seen from fig. 3 and 4 that the filler graphene oxide/polyisocyanate makes the coating form a dense thin film.
Fig. 5 is a general process flow diagram, and fig. 5 includes preparation of graphite oxide, preparation of fluorescent anticorrosive paint and anticorrosive process.
Fig. 6 is a chemical synthesis route for the preparation of graphene oxide/polyisocyanate filler in step one of example 11.
Claims (9)
1. A fluorescent anticorrosive paint is characterized by comprising acrylic resin emulsion, graphene oxide/polyisocyanate filler, a rare earth fluorescent material, a curing agent and a film-forming auxiliary agent; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 0.1-10 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.1-0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 1-5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.1-1: 1.
2. The fluorescent anticorrosive paint according to claim 1, characterized in that the graphene oxide/polyisocyanate filler is prepared by a solution blending method, and the specific process is as follows:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic to obtain a graphene oxide aqueous solution with the mass fraction of 0.01-1%; heating to 90 ℃, adding polyisocyanate into 0.01-1% graphene oxide aqueous solution by mass, and carrying out grafting compounding under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 10-30%.
3. The fluorescent anticorrosive paint according to claim 2, characterized in that the average molecular weight of the polyisocyanate in step (ii) is K12-K90.
4. The fluorescent anticorrosive paint according to claim 1, characterized in that the film forming aids comprise emulsifiers, defoamers, dispersants, wetting agents and low temperature resistant aids; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
5. The preparation method of the fluorescent anticorrosive paint as claimed in claim 1, characterized by comprising the following steps:
firstly, preparing a graphene oxide/polyisocyanate filler by adopting a solution blending method:
firstly, uniformly dispersing graphite oxide in deionized water by ultrasonic to obtain a graphene oxide aqueous solution with the mass fraction of 0.01-1%; heating to 90 ℃, adding polyisocyanate into 0.01-1% graphene oxide aqueous solution by mass, and carrying out grafting compounding under the action of mechanical stirring and ultrasonic oscillation to obtain a composite product; thirdly, sequentially carrying out alcohol washing, water washing, centrifuging, drying and grinding on the composite product to obtain the graphene oxide/polyisocyanate filler; the mass fraction of polyisocyanate in the graphene oxide/polyisocyanate filler is 10-30%;
secondly, mixing by adopting a material filling method:
uniformly distributing oxidized graphene/polyisocyanate filler in acrylic resin emulsion under the action of mechanical stirring and ultrasonic oscillation to obtain an oxidized graphene/polyisocyanate/acrylic resin emulsion mixture;
secondly, adding a rare earth fluorescent material and a film-forming auxiliary agent into the graphene oxide/polyisocyanate/acrylic resin emulsion mixture, performing ultrasonic dispersion for 5-60 min, adding a curing agent, and stirring and mixing for 5-60 min to obtain a fluorescent anticorrosive paint; the doping amount of the graphene oxide/polyisocyanate filler in the fluorescent anticorrosive paint is 0.1-10 wt%; the mass ratio of the graphene oxide/polyisocyanate filler to the film-forming assistant is 1: 0.1-0.5; the addition amount of the curing agent in the fluorescent anticorrosive paint is 1-5 vol%; the volume ratio of the rare earth fluorescent material to the acrylic resin emulsion is 0.1-1: 1.
6. The method for preparing fluorescent anticorrosive paint according to claim 5, characterized in that the average molecular weight of the polyisocyanate in the first step is K12-K90.
7. The preparation method of the fluorescent anticorrosive paint according to claim 5, characterized in that in the first step, graphite oxide is uniformly dispersed in deionized water by ultrasonic dispersion for 30-120 min to obtain the graphene oxide aqueous solution with the mass fraction of 0.01-1%.
8. The preparation method of the fluorescent anticorrosive paint according to claim 5, characterized in that the graft compounding is performed for 30-120 min under the action of mechanical stirring and ultrasonic oscillation in the first step (i).
9. The fluorescent anticorrosive paint according to claim 5, wherein the film-forming assistant in step two comprises an emulsifier, a defoamer, a dispersant, a wetting agent and a low temperature resistant assistant; the mass ratio of the emulsifier to the defoaming agent is 2:1, the mass ratio of the emulsifier to the dispersing agent is 2:1, the mass ratio of the emulsifier to the wetting agent is 1:1, and the mass ratio of the emulsifier to the low-temperature-resistant auxiliary agent is 2: 1.
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| CN115772357A (en) * | 2022-04-28 | 2023-03-10 | 张国伟 | Preparation method of corrosion-resistant fluorescent paint |
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